Do not be so hard on your self, the bush might have grown out some and that made you turn at the wrong angle in relation to the gutter, that happened to a friend of mine, he took out the gutter with the corner of his RV, it took us 3 weekends to repair the RV and one to repair the house, he took out the plants and bushes on that part of the driveway.
There are mobile RV and boat repair guys that do fiber glass and/or metal, look on line maybe you can call one and get an idea of how much greenbacks it is going to cost.
Good luck.
navegator